# Copyright 2020 JD.com, Inc. Galileo Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================

from timeit import default_timer
import tensorflow as tf
from galileo.platform.utils import get_time_str
from galileo.platform.export import export


@export('galileo.tf')
class ElapsedTimeHook(tf.estimator.SessionRunHook):
    def __init__(self, name=''):
        self.name = name

    def begin(self):
        self.begin_time = default_timer()

    def end(self, session):
        et = default_timer() - self.begin_time
        out = f'\n{self.name} total time elapse: {get_time_str(et)}'
        print(out, flush=True)
